Propeller-Powered Zipline Racers
Intro: Propeller-Powered Zipline Racers
This lightning-fast project provides the thrill of propeller-driven thrust, but without the challenges of aerodynamic flight!
You can find the lesson plan, 1-page project sheet, and more project ideas at STEM-Inventions.com
How It Works
It's simple. Winding the propeller will store energy in a rubberband by twisting it. When released, the propeller rapidly unwinds and generates thrust, which pulls the craft along a low-friction zipline. However, the torque from the unwinding propeller can cause the entire racer to flip upside down. To counter this force, another force is introduced: drag. By attaching a paper cutout, drag perpendicular to the side of the racer is created, which helps prevent inversions.
STEP 1: Safety and Tips
CAUTION! Pulling downward on the racer while it is hooked onto the zipline may cause it to be flung off the line upon being released. This can be dangerous when the propeller is rapidly unwinding. Be sure to directly supervise each student at least once as they attempt to launch their racer for the first time. Be sure to correct anyone who pulls on the zipline before a launch.
- Make sure the zipline is either highly visible or above everyone's head.
- Young students (grades 1-3) may need extra guidance while bending the paperclips, attaching the rubberbands, and properly launching the racer.
- Encourage your students to experiment, especially if they're in grades 4 and up - I'm always amazed by their innovations and improvements.
19 Comments
spectrUMDiscoveryArea 4 years ago
https://www.instructables.com/id/Zipline-Racers-Detailed-Instructable-Remix/
LanceMakes 4 years ago
shllys26 5 years ago
Where can I get template for animal shapes, to go one the zip line racer? This is great!
LanceMakes 5 years ago
Hello! I've long since discarded my templates - sorry. To create them, I just printed out silhouettes of images I found online, then traced them onto thin cardboard and cut them out for students to use. Have fun!
26hersheys 6 years ago
I made it for a science project.
gharrel6163 6 years ago
My friends pictures are above me!!!!
chans59 7 years ago
IT IS FUN!!
chans59 7 years ago
Wow!That's Great
AmylouK 11 years ago
stumitch 12 years ago
-stu
LanceMakes 12 years ago
oh, and if you can, please post some photos if you try out this project. Thanks!
stumitch 12 years ago
-stu
hungyhipo 2 12 years ago
LanceMakes 12 years ago
hungyhipo 2 12 years ago
Hiyadudez 12 years ago
Your voice is brilliant and your instructions are super clear and easy to follow. I would follow you, but I already am :D
LanceMakes 12 years ago
rimar2000 12 years ago
mikeasaurus 12 years ago